Read PDFs with adjustable font size. Built-in text-to-speech reads content aloud while highlighting text in sync. Accessibility-focused PDF reader.
Open PDF Reader with Font Size Adjuster → free, no sign-inPDFs don't let you change the font size — the author set it, and that's that. For anyone who finds standard PDF text too small, this is genuinely inaccessible. The PDF Reader with Font Size Adjuster renders your PDF with adjustable text size, and includes a text-to-speech feature that reads the content aloud while highlighting the text on screen so you can follow along.
People with low vision, dyslexia, or other reading difficulties, anyone who prefers to listen to long documents rather than read them, and anyone who finds standard PDF rendering too small on their screen.
No tutorials. No learning curve. Open it and get started.
No server uploads. The read-aloud feature synchronises highlighting with speech — you always know exactly where in the document the voice is reading.
Completely free. No trial period. No premium tier for basic functionality. No account required. Use it as often as you need.
One job, done well. PDF Reader with Font Size Adjuster was built to solve a specific problem cleanly. No feature bloat, no ads, no distractions.
What voices are available for text-to-speech?
Uses the browser's built-in speech synthesis voices — available voices depend on your operating system.
Can I control the reading speed?
Yes — speech rate is adjustable.
Does highlighting work with multi-column PDFs?
Text extraction from complex layouts may not maintain perfect reading order.
Is internet required?
Text-to-speech uses the browser's built-in synthesis which works offline.
What PDF types work best?
Text-based PDFs work best — scanned PDFs need OCR first.
Free. Instant. No sign-in. Open it and get the job done.
Open PDF Reader with Font Size Adjuster on Doathingy.com →